Re: ¿Cómo digo adelanto para empleados?

Bueno,
To keep it simple:

If it is money advanced to pay expenses for which the company is required to reimburse the employee ( for travel, for example), then it is referred to as an advance or travel advance. (per diem would be part of this). This is a very common practice.

If it is money advanced which will be deducted from a coming paycheck...i.e., a loan against wages...it would be a wage advance. I don't think this is a common practice.

Re: ¿Cómo digo adelanto para empleados?

I´ve always understood that an advance is collection of payment before services are rendered.

It is, in some instances.

An advance payment, or simply an advance, is the part of a contractually due sum that is paid or received in advance for goods or services...

An advance on a contract job, for instance, say, in order to buy start-up materials.

However, a wage earning employee always gets paid AFTER performing his/her work. If an employee is asked to travel or provide materials to do a particular job then rather than have the employee spend his/her own funds, the employer may advance the funds necessary to do the work or travel, i.e., expenses. The advance does not include the employee's wages so he/she isn't being paid for services rendered.

Note:

Another form of advance payment is called a "retainer". Lawyers, investigators and other professionals, often require a retainer (advance) upon being retained to represent a client.